Valve-timing device



B. R. VAN VALKENBURG. VALVE TIMING DEVICE. APPLICATION FILED SEPT; 19, 19H].

1,378,154. Patented y 17,1921.

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B. R. VAN VALKENBURG.

VALVE TIMING DEVICE. APPLICATION FILED SEPT. I9, I9I8.

' 1,378,154. en e y17,1921.

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f UNITED STATES] PATENT oFFicE.

BURT n. VAN vALxE'nBmac, "F OAKLAND, CA IFORNIA, Ass'rGnon To AMERICAN" 'rno'ro PLAYER COMPANY, OF BERKELEY, carrronnra, a CORPORATION 01* 0111.15

FoRnIAfi To all whom it may 00mm:

Be itknownthat I BURT I i'iENB'URG, citizen of the United States,- residing'at Oakland, in the county of Alameda and State of California, have invented certainv new and useful Improvements in Valve-Timing Devices, of which the following is a specification. 2

My invention is a valve timing device particularly adapted to be used for timingv the valves of a comp'ressed-air-operated vacuum pump for a combined automatic orcompressed air pump, a compressedainoppump taken on line 6-6 ofFig. 5L

- and exhaust vacuum valves of eratedvacuum pump connected to said compressed airpump, andthe piano of a com'.

bined automatic organ and piano connected I to said vacuum pump,- and my timing device for timing the valves of the vacuum pump.

Fig. .5 is an enlarged rear view'ofsaid vacuum pump and my tlmmg device thereon. Flg. 61s

'Fig. 7 1s a cross section of the vacuum;

pump taken on line 7-7-7 of F ig. 5 looking to the left. 1

Fig.8 is a fragmentary sectional view taken on line-8+8 of Fig. .7 of the intake ,thepump looking to the left. V I Z Fig. 9 is a view of one of the air intake and exhaust valves of the pump with a wall of the valve removed. 1

Fig. 10 is a sectional view of-said air. in",-

take and exhaust valves taken on line 10 10 ofFig. 9.. e .77

Fig. 11 is a sectional view 'OfSaid :air 1ntake and exhaust'valve taken on line 11 -11 In describing my invention in detail I shall begin with the description-of my afore-- saidpump. 1

- In the draw ngs; and indicate agpair.

- of air chambersspaced apartand" secured Specification of Letters Patent.

R. VAN VA L- ,2 are provided with openings 21 and vacu a sectional view of the. vacuum VALVE-TIMING nnvrcn.

- P tented May 17; 1921.,

. Application .filed September-19, 191s. Se'riaiNo. 254,829.

at their corners'to angle bars 3 At one end of said chambers are secured air. in{

take and exhaust valves 4 and 5. A. manifold 6 issecured to and communicates with said valves; The manifold has an air inlet 7. The valves 4 and 5 includejachamber 8, having a detachable front wall 9 secured to itsside walls by screws 10, a pneumatic ll arranged in saidchamber, a port 12 leading from sa d chamber to the atmosphere, a port 13 leading from said port '12. to a port l l in the end wall of chambers 1or 2, and valve members 15a'nd16 connected atthe center;

by rod 17 secured to the movable member of pneumatic 11 and extending through port 12. The valve members 15 and. 16 are connected near their ends by rods 18 which extend through V theport 12. v The plate .9, is provided with a port 19 with which themanifold communicates. An air inlet 20 leads into pneumatic 11,. i

v The inner walls of the air chambers l um manifolds 22 and 23 extend acrossi said. openingsand are secured; to said innerwalls, which'manifoldsare connected by a tube 24. Pistons 25 and 26ar'e arranged in the cham bers 1- and 2 respectively, parallel to the] inner walls thereof. :The edges of said pistons are connected to one end of flexible side walls 27, the other endof which wallsareiconnected tofithe inner corners of the chambers 1 and 2.."A bellows 28 is-arranged centrally of the piston 25 the-flexible walls of which are. connected to the piston ,25; and themanifold 22respectively; Abel'lows 29 is arranged centrally'of the piston 26, the

flexible walls er .which are connected to the, 1;

piston :26 and the manifold 23. PortsBO lead from the manifolds 22 and 23;into the-' bellows 28 and 29 and are controllediby flap valves 31. Ports 32 lead-from the bellows 28 and29.through said,manifoldsto the 1 atmosphere; and are controlled by'flap valves g 33. The pistons25 'and 26 are provided'with openings 34 leadinginto the bellows 28 and 29. whichopeni-ngs are covered by plates 35 screwed to the pistons. The plates maybe readily removed to permit access to, the bel-l lows. Rodsgo extend through the openings,

21 in'the inner walls of the air chambers and connect the pistons 25 and 26 I so that. they reciprocate together.

ports 45 and 46 tothe valves 4 and 5 re- 7' spectively. Valves 49 and 50 control the ports 43 and 44 respectively. Said valves each includes a pair of valve members 51 and 52 secured to a rod 53 extending through ports 43 and 44. Valves'49 and 50 are respectively controlled by pneumatics 54' and 55 arranged Within the chamber 41, the movable members of' which are connectcd to the inner ends of rods 53. A tube 56 connects pneumatic 54 and port 46. A

tube 57 connects'pneumatic 55 and port 45. On blocks 58 and 59 secured tothe top of the chamber 41 are secured spring fingers 60 and 61,'the forward ends of which engage heads 62 and 63 on the outer end of rods 53. On a block 64 mounted on top of the chamber 41 is pivoted a valve operating lever 65, one end of which is adapted to engage'head 62 and the other end is adapted to engage head 63. The lever 65 has an arm 66 connected to one end'of a spring 67 the other'en'd of which spring is connected to a pin 68 on top of chamber 41, the spring being-arranged to swing with the arm 66 across the pivot oflever 65 to swing the ends of the lever alternately against the heads62 and '63 to operate valves 49 and 50rto close the ports 43 and 44 to, the atmosphere alternately. Pins 69 and :70 extend from a rod 36 for engaging arm 66 to; operate le- 7 ver 65.

- and pump to be in the positionshown in Figs. 1, 2, .3, 5, 6 and 7, the operation of A vacuum tube 71 connects-tube 24 and a pneumatic'equalizer 72. An organ "air compression pump 75 is shown in Fig. 4 and y to its 'o'u'tlet tube 76 is connected a tube 77. which leads into manifold 6, and connects with tube 78 leadingito inlet-42 of timer" A pneumatic piano '80 of a chamber 41. combined automatic organ and piano is shown in Fig.4. vA tube 81 connects the equalizerto the pneumatic action of piano 80. f

Assuming the parts of my timing device 7 my timing device is as follows:

The pin 69 having engaged arm 66,"one end of lever is held against head 62 by spring 67 whereby valve members'51 and 52, respectively, of valve49 close the outer end of port'43 and open the inner'end of said port. The spring 61 holds the valve 50 in'position with the member 52 closing the inner end of port 44 and member 51 opening the outer end of said port. Air is pumped by organ pump 75 through tube 77 into manifold 6 and through tube 78 and inlet 42 into timer chamber 41; through ports 43 and 45 and tube 47 into pneumatic ll of valve 4 and through tube 57 into pneumatic 55. Pneumatic. 55 applies its action in addition to spring 61 to hold the valve 50 inposition shown in Fig. 2. Pneumatic 11 of valve 4 forcesvalve member'15 into closed position and valve member 16 into open posie tion. Air passes from manifold 6 into valve 4 but is prevented by member 15 from passing through ports 12, 13 and 14 into chamber 1. The closing of thefinner end of port 44by spring 61 and pneumatic 55 prevents compressed air from passing from chamber 41 throughports 44 and 46,; and tube 48 into pneumatic 11 of valve 5. Air from manifold 6 enters chamber8 of valve 5 and collapses pneumatic 11, the air in said pneumatic being forced out through tube 48 port 46 and port 44 into the atmosphere. The collapsing of said pneumatic lifts valve members 15v and 16 of valve5, and opens the inner end of port 12 and closes the outer end of said port, whereupon compressed air passes from valve chamber 8 through ports 12,13 and. 14 into chamber 2 between the piston 26 and wall 27 and the chamberwall. j

and forces saidp istoniand piston 25 .up-' wardly in their respective chambers. The upward movement-of piston 25 causes: bellows 28 to open valve 31 and to suck air into itself from the action of piano 80 through tube 81, equalizer 72, tubes 71, 24

and '22 and. ports-30, while the upward movement of piston 26 causes bellows'29 to. open 1ts valve 33 and force the air inthe bellows out through ports 32 into the atmosphere. The upwardm'ovement of piston' 25 forces a1r from the chamber 1 out through itsport 14 and ports 13 and 12 into the atmosphere.

When the pistons 26 and 25 reach the end of'their upward stroke thepin "engages arm 66 and trips lever 65, causing the lever to release head 62 and engage head 63,'whereupon spring 60 lifts valve 49,.and closes the inner end of port 43 and opens the :outerend thereof, while the'lever' depresses valve. 50 and closes the outer end of port 44 and opens the inner end of said port. Airis shut off from valve 5 by valve49 andthe pistons cease to move upwardly. Air passes from chamber 41 throughports 44 and 46," and through' tube 56 into'pneumatic 54 which positively holds valve 49 lifted and closing the inner end and opening the vouter endof port 43. Air passes from 'chamberY-4l through ports 44 and 46, and-tube 48 into pneumatic 11 of valve 5, whereuponlsaid pneumatic forces valve members 15 and '16 of said valve down until they close the upper end and open the lower end of port 12 of said valve. Air from manifold 6 enters valve 4 and collapses pneumatic 11 of said valve which lifts valve members 15 and 16 thereof and opens the inner end and closes the outer end of the port 12 of said valve, the air in said pneumatic passing out through tube 47, port and-port 13 into the atmosphere. Air under compression passes from the chamber 8 of valve 4 into chamber 1 between piston 25 and its side walls 27 and the walls of the chamber land forces said piston and piston 26 downwardly. The downward movement of the pistons causes bellows 29 to open its valve 31 and suck air into itself from the piano action through tube 81, equalizer 72, tubes 71 and 24, manifold 23 and ports 30, while the bellows 28 forces the air therein out through its ports 32 into the atmosphere. The downward movement of piston 26 forces air out of chamber 2 through its port 14:, and ports 13 and 12 of valve 5 into the atmosphere.

Between strokes of the pistons 25 and 26 the equalizer 72 automatically sucks air from the piano action through tube 81 and forces the air through tubes 71 and 24:,

manifolds 22 and 23 and ports 30 into the bellows 28 and 29 from which it is ejected upon the compression stroke of the bellows, thus maintaining a continuous suction action through the pump and acontinuous vacuum in the piano action.

A complete cycle of operations of my timing device has been described.

Having described my invention, I claim as new and desire to secure by Letters Patent:

1. A valve timing device includingacham-- ber provided with a pair of ports, leading from the chamber to the atmosphere, valves controlling both ends of said ports, said chamber being also provided with ports leading from the aforesaid ports, means for normally holding said valves in position closing the inner end of the aforesaid ports,v

a lever for engaging said valves and causing them to open the inner end and close the outer" end of the aforesaidports, and means for operating said lever.

2. A valve timing "device including a chamber provided with a pair of ports, leading from the chamber to the atmosphere,

valves controlling both ends of said ports,

said chamber being also provided with ports. leading from the aforesaid port's, means for I normally holding said valves in position them to open the inner end and close the outer end of the aforesaid ports, and a spring for holding said lever in engagement with one valve or the other.

3. A valve timing device including a chamber provided with a pair of ports leading from thechamber to the atmosphere, valves controlling both ends of said ports, said chamber being also provided with ports leading from the aforesaid ports, means for normallymaintaining each valve in position closing the inner end of-the aforesaid ports and opening the outer end thereof,'auxiliary 'mean's acting'to maintain each valve in said pos1t1on,- and means for actuating said valves to ,open the inner end and close the outer end of the aforesaid ports.

4.. A valve timing device including a;

chamber provided with a pair of ports lead- 1 I ing from the chamber to the atmosphere,

valves controlling both ends of said ports, said chamber being also provided with ports leading from the aforesaid ports, means for normally maintaining each valve in positionclosing the inner end of the aforesaid ports and opening the outer end thereof, a

' pneumatic communicating witheach of the aforesaid ports, each of said pneumatics acting to actuate one of said valves to cause the valve to close the inner end and open the outer end of one of the aforesaid ports and meansjfor actuating said valves to open the inner end and close the outer end of the V aforesaid ports.

In testimony whereof aflix my signature.

' 1 BURT R. VAN VALKENBURG. 

